Apple seems determined to maintain control of its products. One popular use of jailbreaking is to make iPhones and iPads compatible with carriers other than AT&T.
It’s a little counter-intuitive, but this principle has paid off beyond anyone’s wildest dreams. The numbers are staggering: as you’ve probably heard, iPhone/iPod Touch fans downloaded 1 billion apps within 9 months. Some iPhone programmers have become millionaires within months…yes, selling $1 software…because of this crazy math. $20 may sound like more than $1, but not when 1,000 times more people buy at $1.